A Brief Guide To Battery Types - ROBBE Power Peak E1 Bedienungsanleitung

17. A brief guide to battery types

18. The CC - CV charge process
Lead-acid and Lithium batteries are charged
using the constant voltage method (CC -
CV).
For this reason it is necessary to enter the
final charge voltage per cell in this menu, in
accordance with the battery type.
During the initial charge phase the battery
voltage rises slowly to the maximum value of
4.2 V / cell (LiPo battery).
In this phase the charger ensures that the
Constant current phase (CC)
Cut-off point
charge current remains constantly at the set
value.
Starting with a discharged battery and a
charge current of 1C, this initial phase lasts
about 50 to 60 minutes, during which time
about 80 - 90% of full battery capacity is
charged in.
When the final charge voltage is reached, the
constant charge current is switched off and
the voltage held constant.
During the second phase the charge current
therefore diminishes, since the difference
between the voltage set on the charger and
the battery is steadily declining.
A further 35 - 40 minutes are required in
order to charge in the remaining capacity.
The charger terminates the process when
the charge current falls to the pre-set bottom
limit.
At a charge rate of 1C this means that the
total charge process takes about 90 minutes.
Operating instructions
Power Peak E1
19. Lead-acid batteries
When handling Lead-acid batteries cer-
tain safety measures are absolutely
necessary to avoid the risk of personal
injury and property damage. When you
use these batteries, you personally
accept the responsibility for any pro-
blems which may arise.
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)Constant voltage
phase (CV)
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20
The lead-gel batteries which are in wide-
spread use in the modelling world are
usually gas-tight, and therefore less
hazardous than conventional Lead-acid
types.
In contrast, car batteries with fluid sulphu-
ric acid electrolyte are extremely hazar-
dous, because the acid is corrosive, and
the cells quickly generate gas when over-
charged.
Lead-acid batteries must never come into
contact with open fire, as they may
explode.
Never forcibly open Lead-acid cells: they
contain corrosive materials.
Never short-circuit Lead-acid cells: fire
hazard, possible explosion hazard.
If electrolyte should escape from the cell,
do not allow it to touch your skin or eyes.
If this should happen despite taking nor-
mal precautions, immediately wash it off
using plenty of clean water, and seek
medical attention immediately. Never
place Lead-acid cells or batteries in your
mouth, as they are poisonous.
A charged Lead-acid battery is not a
child's plaything. Store these batteries
well out of the reach of children.
Be sure to observe the battery manu-
facturer's instructions when charging and
discharging Lead-acid batteries.
Lead-acid batteries may generate hydro-
gen gas ("gassing") during the charge
process. For this reason good ventila-
tion is essential.
If overcharged, these batteries generate
an explosive mixture of hydrogen and
oxygen.
Explosion hazard.
Order No.
8471